A method for electrical cascading of aerospace optical fiber inertial groups

Abstract

The invention is an electrical cascading method of an aerospace optical fiber inertial group, which realizes the electrical connection between the circuit board, the electrical connector and the optical fiber gyroscope in the aerospace optical fiber inertial group by using a high-temperature ribbon cable with an anti-irradiation index; The ribbon cable wire ends are welded on the surface mount pads to realize the electrical connection between the ribbon cable and the circuit board; by using epoxy glue to fix the ribbon cable wire ends, the ribbon cable solder joints are not stressed under the mechanical environment purpose; by designing and manufacturing special-shaped ribbon cables to realize the electrical connection between electrical connectors, fiber optic gyroscopes and circuit boards; The sequential connection of cables greatly improves the correctness of assembly and inspection and production efficiency; by using surface mount pads to solder ribbon cable wire ends, the assembly difficulty of soldering wire ends in through-hole pads is effectively reduced. And less difficult to repair.

Description

technical field [0001] The invention relates to an electrical cascading method for an aerospace optical fiber inertial group, which belongs to the technical field of inertial measurement. Background technique [0002] The main function of the aerospace fiber inertial group is to measure the rotational angular velocity of the spacecraft's three orthogonal axes relative to the inertial space, and to provide attitude measurement information for the spacecraft to achieve high-precision and high-stability attitude control. It is a key and important part of the spacecraft. Its electrical The reliability of the connection directly affects the service life of the spacecraft. Therefore, the reliability of the electrical connection between the various electrical components of the optical fiber inertial group with compact structure and small space is the main content of the development of the optical fiber inertial group. [0003] The optical fiber inertial group is composed of optica...

AI Technical Summary

Problems solved by technology

[0006] 2) After the assembly is completed, due to the different lengths of the multiple wires, the wires are disordered inside the product, which increases the volume of the product and reduces the reliability of the product.

[0007] 3) Due to the large number of wires, it is easy to make mistakes in the position of the welding wires. It must be checked and confirmed multiple times through mutual inspection and special inspection. Pads can also cause damage

[0008] 4) Due to the small internal space of the product, when welding the wires, the welding operation can only be performed from the component surface, not from the solder joint surface, causing the wires inside the insulation to be soaked and hardened by the solder, and the wires are easily broken at the hardened place , causing electrical failure

[0010] 1) The mechanical strength of the flexible printed wire is lower than that of a single wire, and the allowable bending radius is larger than that of a single wire, resulting in an increase in product volume. At the same time, care must be taken during assembly to prevent the flexible printed wire from being damaged and increase assembly difficulty

[0011] 2) After the rigid printed circuit board in the rigid-flex printed circuit board is soldered to the pins of another circuit board, when the rigid-flex printed circuit board is reworked and disassembled, it is necessary to clean all the via holes on all the pins After that, it can be removed, so the disassembly operation is very difficult, and it is not very maintainable

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